Final answer:
For the scenario to be a community, different species within the pond must interact with each other. Due to climate change and pollution, species with rapid and various reproduction methods like parthenogenesis and budding are more likely to survive in changing conditions. Frogs are environmental indicators and their decline signals broader issues within an ecosystem.
Step-by-step explanation:
To make the scenario a community, there would need to be an interaction between different species within the pond ecosystem. A community in ecological terms includes all the different species living in a specific area, which interact with each other. In the case of the frogs in the pond, if there are other organisms such as fish, insects, aquatic plants, microorganisms, and possibly predators, and they interact with the frogs and among themselves, then this would represent a community.
In the given scenario regarding the lake with various species, including sexually reproducing frogs, due to global climate change and pollution leading to changes in temperature and pH, the organisms that are able to reproduce rapidly and tolerate a broad range of conditions would most likely survive. This may include water fleas that multiply by parthenogenesis, hydra that multiply by budding, and sponges that multiply by fragmentation. Frogs, being more complex and sensitive to environmental changes, may be less likely to survive the changing conditions.
Amphibians like frogs are considered environmental indicators because their decline can signal an ecosystem's health issues. This is critical information for understanding the implications of environmental changes on food webs and ecosystems.